The tweet is being interpreted as a hint about a new album, possibly titled "25." It's been rumored to be in the works since last year. Adele's previous two albums, 19 and the best-selling 21, were both named after the age Adele was while recording them.

Very little information about Adele's much-anticipated follow-up has emerged in recent months. Ryan Tedder has confirmed working with the singer as a producer, and Phil Collins and rapper Wiz Khalifa have also spoken about spending time in the studio with Adele.